Die-stock



(No Model.) 2 Sheets-Sheet 1.

P. ARMSTRONG.

DIE STOCK. No. 495,214. Patented Apr. 11, 1893.

15H In :ii

W/TNESSES: e5? nwmroa: 6. M. BY

(No Model.) 2 Sheets-Sheet 2.

F. ARMSTRONG.

I DIE STOCK. No. 495,214. Patented Apr. 11, 1893.

WITNESSES.

lNVENTOH. v i

J? K (9.1x w I WW UNITED STATES PATENT ()FFICE.

FRANK ARMSTRONG, OF BRIDGEPORT, CONNECTICUT.

DIE-STOCK.

SPECIFICATION forming part of Letters Patent No. 495,214, dated April11, 1893.

Application filed March 21 1892.

To all whom it may concern.-

Be it known that I, FRANK ARMSTRONG, a citizen of the United States,residing at Bridgeport, in the county of Fairfield and State ofConnecticut, have invented certain new and useful Improvements inDie-Stocks;- and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

' This invention relates to certain novel and useful improvements in diestocks, but more particularly to an attachment for use in connectionwith die stocks and the like whereby their ease of operation in certainsituations is enhanced. The die stock as ordinarily made is providedwith two or more outwardly extended handles by means of which the stockis turned around the pipe to be threaded, and where space permits, thisis the simplest and most satisfactory means for operating the tool. Itsometimes happens, however, that the pipe to be threaded is so situatedthat space for the free sweep of the handles cannot be had. In such acase as this a ratchet stock is usually employed when it is obtainable.

It is the object of my invention to provide for use in connection withordinary die stocks, a ratchet handle of novel construction, which canbe readily attached to or disconnected from the stock, thereby to allintents and purposes making each stock answer the purpose of twodifferent tools; and with these ends in view my invention consists andresides in the construction and the several combinations of co-operatingelements presently to be described and then recited in the claims.

In order that those skilled in the art to which myinvention appertainsmayfully understand its construction and method of operation I willdescribe the same in detail, reference being had to the accompanyingdrawings which form a part of this specification, and in which,

Figure 1, is a plan view of a die stock having attached thereto theratchet handle; Fig. 2, a side elevation; Fig. 3, a detail sideelevation of the ratchet ring; Fig. 4, a horizontal section upon theline y-y of Fig. 2, the die stock'bcing omitted; Fig. 5, a plan view ofthe die stock with the ratchet attachment removed.

As shown more particularly in Fig. 5 the Serial No. 425.730- (No model.)

the pipe and is provided with a tubular ex-- tension or sleeve 4wherebythe pipe is guided toward the threading dies 5 which appear at Figs.1and 5. Upon thebase of the die stock are formed opposing shoulders 6,and upon the tubular extension 4 are casta pair of lugs 7 for thepurpose presently to be explained. The screws 8 and 9,,which appear atthe bottom of Fig. 2, are designed to adjust and secure the dies, but,as heretofore stated, this construction is immaterial and forms no partof my present invention.

The ratchet attachment which is adapted to fit upon and co-operate withthe stock just described, consists primarily of a ring or sleeve 10provided on its lower edge with two pairs of legs 11, which legs seatagainst the shoulder 6 when the ring is in position. This ring is alsoprovided upon its'periphery with ratchet teeth 12, and it is alsoprovided with lugs 13 which are intended to co-operate with the externallugs 7 upon the tubular extension to hold the sleeve 10 in firmengagement with said extension. To prevent the sleeve 10 from risingupon the tubular extension, I provide a locking device which preferablyconsists of a set screw 14 insertible into a threaded seat in one of thelugs 7. It will be understood from the foregoing description that whenin position, the sleeve 10 to all intents and purposes becomes a part ofthe tubular extension on the stock.

For the purpose of turning the sleeve and stock I provide a ring 14*made in two sections fastened together by pins or rivets 15, whichsurrounds the sleeve 10 and incloses and is guided upon the teeth 12,which, latter, as shown by the dotted lines at Fig. 4, project beyondthe inside line of the ring. To this ring is attached, or it may beformed integral therewith, a shank 16 provided with a socket 17 for theinsertion of a handle. Within this shank is pivoted a double-faced pawl18, the face of which behind the pivot is angular, and is engaged by anoblique-faced spring-actw ated stud 19, whereby either face of the pawl,as may be required, is held against the ratchet teeth 12 upon thesleeve. To shift this pawl ,it is only necessary to depress theoutwardly extendingend which projects, as at a, beyond the exterior ofthe ring,'until the angular face of the pawl passes the face 19, whensaid stud will act on the pawl in the reverse direction and the ratchetwill be changed from a right hand to a left hand, or the reverse, as thecase may be.

When a ratchet stock is required to be used the handles are detachedfrom the ordinary stock and the ratchet sleeve slipped over the tubularextension and there seou red by means of the set screw 14. As heretoforestated, the engagement of the legs 11 against the shoulders 6supplemented by the engagement of the lugs 13 with the lugs 7 securelyhold the two co-operating parts in position. Then, by a vibratorymovement of the handle on the ratchet ring, the sleeve and stock may beturned intermittently until the threading of the pipe is complete. Thenby reversing the position of the pawl the stock may be in the samemanner removed from the pipe.

I claim.

1. The combination with the stock having thereon the tubular extensionand having also abutment shoulders, of the sleeve provided with ratchetteeth and having legs for abutment against the shoulders, and theratchet ring providedwith a handle and with a pawl connected to andadapted to operate the sleeve,

substantially as and for the purpose set forth.

2. The combination with the stock having a tubular extension andprovided with opposed pairs of abutment shoulders, of the sleeve 10having legs 11 and ratchet teeth 12, the two-part ring 14: surroundingthe ratchet teeth, the pivoted double-faced pawl adapted to co-operatewith the ratchetteeth, and a suitable handle for the operation of ring14.

3. The combination with the stock having a tubular extension providedwith external lugs 7, of the sleeve 10 having lugs 13 and teeth 12, thetwo-part ring 14. surrounding the sleeve and ratchet teeth,adouble-faced pawl carried by the ring, a spring plunger for engagementwith the pawl, and a suitable handle, all arranged substantially asdescribed.

4. The combination with the stock having a tubular extension providedwith lugs 7, of the sleeve 10 having legs 1l,ratohet teeth 12, andprojecting lugs 13, the two-part ring 14: surrounding the sleeve andinclosing the teeth, the double-faced spring-actuated pawl 18, and asuitable handle, the parts being combined and adapted to operatesubstantially as specified.

In testimony whereof I affix my signature in presence of two Witnesses.

FRANK ARMSTRONG.

Witnesses:

S. H. HUBBARD, A. J. TANNER.

